Rheotanytarsus muscicola

Author: Thienemann, 1929

Exuviae 4.1-4.5mm long (n=4).
Cephalothorax: Frontal apotome smooth. Thoracic horn 495-600µm long, with the distal half bearing many setulae (134f.jpg); ThR 10.5-15.8 (n=4). Thoracic horn spinule 8-13µm long (n=3). Pearl row absent.
Abdomen: Tergites II-V with anterior paired point patches (on VI some of the points in the anterior shagreen may be enlarged) and the shagreen next to the point patches extending over and beyond the first dorsal seta (134g.jpg). The postero-lateral corner of segment VIII bears a simple, cleft or toothed spur, or three spurs, of which the outermost is the strongest and bent as a hook. Lateral taeniae of segments IV-VIII: 1(2),3,4(3),4,4.
Anal segment: Fringe of anal lobe with 30-34 taeniae (n=4); a dorsal seta absent.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 402: Tanytarsini 45 Rheotanytarsus of the Text Key.

Widespread in Europe, circum-Mediterranean.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes